I thought there was a post somewhere listing all of this year's stages as they're found, but I can't find it anywhere.

Also, is there a way to get a different disease yet?

Here is the topic :) Not sure if they added the newest ones yet. And I don't think there is a cure yet.

this thread you mean? :3

[EDIT] Ah, pipped to the post. xD;

Yeah they don't have the Stage 2, yet. Stage 2 just popped up this morning, I believe. But if you goto the last page of that thread users are posting the names of people that are in Stage 2 so you can see them.